From 4f09948eda37f7e96ecfe9f5acdf7fdbf708c7cf Mon Sep 17 00:00:00 2001
From: Chris Frankland-Wright <85807217+cjfranko@users.noreply.github.com>
Date: Mon, 7 Jul 2025 00:13:40 +0100
Subject: [PATCH] Delete timeturner.py

---
 timeturner.py | 83 ---------------------------------------------------
 1 file changed, 83 deletions(-)
 delete mode 100644 timeturner.py

diff --git a/timeturner.py b/timeturner.py
deleted file mode 100644
index 27c650a..0000000
--- a/timeturner.py
+++ /dev/null
@@ -1,83 +0,0 @@
-import numpy as np
-import sounddevice as sd
-import scipy.signal as signal
-import matplotlib.pyplot as plt
-import time
-
-# --- Configuration ---
-SAMPLE_RATE = 48000
-CUTOFF_FREQ = 1000.0
-BLOCK_SIZE = 2048
-SYNC_WORD = "0011111111111101"
-
-# --- Filtering ---
-def highpass_filter(data, cutoff=CUTOFF_FREQ, fs=SAMPLE_RATE, order=5):
-    nyq = 0.5 * fs
-    normal_cutoff = cutoff / nyq
-    b, a = signal.butter(order, normal_cutoff, btype='high', analog=False)
-    return signal.lfilter(b, a, data)
-
-# --- Edge Detection ---
-def detect_edges(data):
-    return np.where(np.diff(np.signbit(data)))[0]
-
-# --- Pulse Width to Bitstream ---
-def classify_bits(edges, fs):
-    durations = np.diff(edges) / fs
-    threshold = np.median(durations) * 1.2
-    bits = ['1' if dur < threshold else '0' for dur in durations]
-    return bits, durations, threshold
-
-# --- LTC Sync & Decode ---
-def extract_ltc_frame(bitstream):
-    bits = ''.join(bitstream)
-    idx = bits.find(SYNC_WORD)
-    if idx != -1 and idx + 80 <= len(bits):
-        return bits[idx:idx+80], idx
-    return None, None
-
-def decode_timecode(bits):
-    def bcd(b): return int(b[0:4], 2) + 10 * int(b[4:8], 2)
-    frames = bcd(bits[0:8])
-    seconds = bcd(bits[16:24])
-    minutes = bcd(bits[32:40])
-    hours = bcd(bits[48:56])
-    return f"{hours:02}:{minutes:02}:{seconds:02}:{frames:02}"
-
-# --- Stream Callback ---
-def process(indata, frames, time_info, status):
-    audio = indata[:, 0]
-    filtered = highpass_filter(audio)
-
-    peak_db = 20 * np.log10(np.max(np.abs(filtered)) + 1e-6)
-    print(f"🎚️  Input Level: {peak_db:.2f} dB")
-
-    edges = detect_edges(filtered)
-    print(f"📎 Found {len(edges)} edges.")
-
-    if len(edges) < 10:
-        return
-
-    bits, durations, threshold = classify_bits(edges, SAMPLE_RATE)
-    print(f"📊 Avg pulse width: {np.mean(durations):.5f} sec")
-    print(f"📊 Min: {np.min(durations):.5f}, Max: {np.max(durations):.5f}")
-    print(f"🔧 Adaptive threshold: {threshold:.5f} sec")
-    print(f"🧮 Extracted {len(bits)} bits.")
-    print(f"🧾 Bitstream (first 80 bits):\n{''.join(bits[:80])}")
-
-    frame, idx = extract_ltc_frame(bits)
-    if frame:
-        print(f"🔓 Sync word found at bit {idx}")
-        print(f"✅ LTC Timecode: {decode_timecode(frame)}")
-    else:
-        print(f"⚠️ No valid LTC frame detected.")
-
-# --- Main ---
-print("🔊 Starting real-time audio stream...")
-
-try:
-    with sd.InputStream(callback=process, channels=1, samplerate=SAMPLE_RATE, blocksize=BLOCK_SIZE):
-        while True:
-            time.sleep(0.5)
-except KeyboardInterrupt:
-    print("🛑 Stopped by user.")